The National Transportation Safety Board says altimeter in the Black Hawk helicopter may have malfunctioned before the DCA mid-air collision with an American Airlines jet. All 67 people aboard died.
The U.S. National Transportation Safety Board (NTSB) said Friday that the Army Black Hawk helicopter's crew might not ...
The National Transportation Safety Board says altimeter in the Black Hawk helicopter may have malfunctioned before the DCA ...
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